WO2023209841A1 - Climatiseur - Google Patents

Climatiseur Download PDF

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Publication number
WO2023209841A1
WO2023209841A1 PCT/JP2022/019020 JP2022019020W WO2023209841A1 WO 2023209841 A1 WO2023209841 A1 WO 2023209841A1 JP 2022019020 W JP2022019020 W JP 2022019020W WO 2023209841 A1 WO2023209841 A1 WO 2023209841A1
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WO
WIPO (PCT)
Prior art keywords
unit
indoor
electrical box
ground connection
air conditioner
Prior art date
Application number
PCT/JP2022/019020
Other languages
English (en)
Japanese (ja)
Inventor
光悦 岡部
光 梅澤
Original Assignee
日立ジョンソンコントロールズ空調株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立ジョンソンコントロールズ空調株式会社 filed Critical 日立ジョンソンコントロールズ空調株式会社
Priority to JP2022545407A priority Critical patent/JP7246580B1/ja
Priority to PCT/JP2022/019020 priority patent/WO2023209841A1/fr
Priority to CN202280031033.5A priority patent/CN117321346A/zh
Priority to JP2022170530A priority patent/JP2023163115A/ja
Priority to TW112115797A priority patent/TW202346766A/zh
Publication of WO2023209841A1 publication Critical patent/WO2023209841A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to an air conditioner.
  • Patent Document 1 discloses a ventilation device disposed between an indoor unit and a wall surface.
  • an optional unit such as a ventilation system
  • power must be supplied to the optional unit in addition to the indoor unit and outdoor unit. Therefore, the optional unit also needs to be connected to the earth ground.
  • the present invention was made in view of these problems, and an object of the present invention is to connect an optional unit of an air conditioner to the earth with a simple configuration.
  • the present invention provides an air conditioner that includes an indoor unit, an outdoor unit, and an optional unit, and the ground connection line of the option unit is the ground connection line of the indoor unit, and the ground connection line of the outdoor unit.
  • an optional unit of an air conditioner can be connected to the earth ground with a simple configuration.
  • FIG. 1 is an external view of an air conditioner according to a first embodiment. It is a diagram showing a refrigerant circuit. It is a figure showing the composition concerning the connection of the power line and the communication line of an air conditioner. It is a figure showing the composition concerning the ground of an air conditioner. It is a figure showing the composition concerning earth ground of an air conditioner concerning a 2nd embodiment.
  • FIG. 1 is an external view of an air conditioner according to the first embodiment.
  • the air conditioner 1 of this embodiment includes an indoor unit 10 and an outdoor unit 20 that have an air conditioning function, and a ventilation device 30 that has a ventilation function.
  • the ventilation device 30 is an example of an optional unit that is connected to the indoor unit 10 or the outdoor unit 20 through a communication line, or is supplied with electricity from the indoor unit 10 or the outdoor unit 20.
  • the ventilation device 30 is arranged adjacent to the side surface of the indoor unit 10.
  • An intake hose (not shown) that takes in outside air is connected to the ventilation device 30.
  • the intake hose together with refrigerant piping and the like provided in the indoor unit 10, is arranged so as to extend outdoors through a hole provided in the wall of the building.
  • the ventilation device 30 mainly includes a filter, a blower fan, and an outlet, and outside air taken in through an intake hose passes through the filter and is sent into the room from the outlet.
  • the air conditioner 1 performs air conditioning by circulating a refrigerant in a refrigeration cycle (heat pump cycle).
  • the air conditioner 1 includes an indoor unit 10 installed indoors (air-conditioned space), an outdoor unit 20 installed outdoors (outdoors), and a remote control 19 operated by a user.
  • the indoor unit 10 includes a remote control communication section 11.
  • the remote control communication unit 11 transmits and receives predetermined signals to and from the remote control 19 by infrared communication or the like.
  • the remote control communication unit 11 receives signals from the remote control 19 such as commands to start/stop air conditioning operation and ventilation operation, changes in temperature settings, changes in operation mode, and settings of timers.
  • the remote control communication unit 11 transmits the detected value of the indoor temperature, etc. to the remote control 19.
  • the indoor unit 10 and the outdoor unit 20 are connected via a refrigerant pipe, and are also connected via a communication line and a power line.
  • a ventilation device remote control for operating the ventilation device 30 may be provided separately from the remote control 19.
  • the remote control communication unit 11 of the indoor unit 10 receives the ventilation operation signal from the ventilation device remote control.
  • FIG. 2 is a diagram showing the refrigerant circuit Q of the indoor unit 10 and the outdoor unit 20 according to the embodiment.
  • the solid line arrow shown in FIG. 2 has shown the flow of the refrigerant
  • the broken line arrow shown in FIG. 2 indicates the flow of refrigerant in the refrigerant pipe 5 during cooling operation.
  • the indoor unit 10 includes an indoor heat exchanger 12 and an indoor fan 14.
  • the indoor heat exchanger 12 heat exchange is performed between the refrigerant flowing through the heat exchanger tubes (not shown) and the indoor air mixed in from the indoor fan 14.
  • the indoor heat exchanger 12 operates as a condenser or an evaporator by switching a four-way valve 25, which will be described later.
  • the indoor fan 14 is installed near the indoor heat exchanger 12. The indoor fan 14 sends indoor air to the indoor heat exchanger 12 by driving the indoor fan motor 14a.
  • the outdoor unit 20 includes a compressor 21, an outdoor heat exchanger 22, an outdoor fan 23, an outdoor expansion valve 24 (expansion valve), and a four-way valve 25.
  • the compressor 21 is driven by a compressor motor 21a to compress a low temperature, low pressure gas refrigerant and discharge it as a high temperature, high pressure gas refrigerant.
  • heat exchange is performed between the refrigerant flowing through the heat exchanger tubes (not shown) and the outside air sent from the outdoor fan 23.
  • the outdoor heat exchanger 22 operates as a condenser or an evaporator by switching the four-way valve 25.
  • the outdoor fan 23 is installed near the outdoor heat exchanger 22.
  • the outdoor fan 23 sends outside air to the outdoor heat exchanger 22 by driving the outdoor fan motor 23a.
  • the outdoor expansion valve 24 has a function of reducing the pressure of the refrigerant condensed in the "condenser" (one of the outdoor heat exchanger 22 and the indoor heat exchanger 12). Note that the refrigerant whose pressure has been reduced in the outdoor expansion valve 24 is guided to the "evaporator" (the other of the outdoor heat exchanger 22 and the indoor heat exchanger 12).
  • the four-way valve 25 is a valve that switches the refrigerant flow path according to the operating mode of the air conditioner 1.
  • the refrigerant is supplied to the compressor 21, the outdoor heat exchanger 22 (condenser), the outdoor expansion valve 24, and the indoor heat exchanger 12 (evaporator) in the order shown by the broken line arrow. becomes a refrigeration cycle.
  • the compressor 21, indoor heat exchanger 12 (condenser), outdoor expansion valve 24, and outdoor heat exchanger 22 (evaporator) are activated in the order shown by the solid arrow. It becomes a refrigeration cycle in which refrigerant circulates.
  • FIG. 3 is a diagram showing a configuration related to the connection of power lines and communication lines in the air conditioner 1.
  • the indoor unit 10 is mainly provided with an indoor terminal block 110 and an indoor control board 120.
  • the indoor control board 120 is equipped with a circuit that controls the indoor unit 10.
  • the indoor control board 120 mainly includes a relay 121, an NF (noise filter) 122, a CNV (rectifier circuit) 123, an SW (switching) power supply 124, a communication circuit 125, and a dedicated communication terminal 126. It is installed.
  • the dedicated communication terminal 126 is, for example, an HA (home automation) terminal.
  • the outdoor unit 20 is mainly provided with an outdoor terminal block 210 and an outdoor control board 220.
  • the outdoor control board 220 is equipped with a circuit that controls the outdoor unit 20.
  • the outdoor control board 220 mainly includes an NF 221, a CNV 222, an SW power supply 223, and a communication circuit 224.
  • the ventilation device 30 is provided with a first terminal block 310, a second terminal block 320, a ventilation control board 330, a display section 341, an SW 342, a ventilation fan 343, and an ST motor 344.
  • the ventilation control board 330 is equipped with a circuit that controls the ventilation device 30.
  • the ventilation control board 330 is mainly equipped with an NF331, a CNV332, an SW power supply 333, an FET (field effect transistor) 334, an MPU (microprocessor) 335, a dedicated communication terminal 336, and a photocoupler 337. has been done.
  • the indoor unit 10 and the ventilation device 30 are connected via a first cable 61. Further, the outdoor unit 20 and the ventilation device 30 are connected via a second cable 62.
  • a third cable 63 extending from a power plug 40 is connected to the indoor unit 10, and power is supplied from a commercial power source to the indoor unit 10 via the power plug 40.
  • the first cable 61, the second cable 62, and the third cable 63 are, for example, F cables such as VVF cables.
  • the first cable 61 includes first power lines 41a and 41b and a first communication line 51.
  • the second cable 62 includes second power lines 42a and 42b and a second communication line 52.
  • the third cable 63 includes third power lines 43a and 43b.
  • One third power line 43a of the third cable 63 is connected to the indoor control board 120 in the indoor unit 10. Specifically, the third power supply line 43a is connected to the SW power supply 124 via the NF122 and the CNV123. Further, a fourth power line 44a branched from the third power line 43a is connected to the connection terminal 111 of the indoor terminal block 110.
  • the fourth power supply line 44a is provided with a relay 121, and is controlled to stop power supply to the outdoor unit 20 and ventilation device 30 when the air conditioning operation and ventilation operation are stopped.
  • relay 121 is controlled to start supplying power to outdoor unit 20 and ventilation device 30. Even when the ventilation operation is performed independently without performing the air conditioning operation, the relay 121 is turned on and power is supplied to the ventilation device 30.
  • the fourth power line 44a is connected to the first power line 41a of the first cable 41 via the connection terminal 111.
  • the other third power line 43b of the third cable 63 branches at connection terminals 112 and 113 provided on the indoor terminal block 110, and connects to the fourth power line 44b and the first power line 41b of the first cable 41. .
  • the fourth power line 44b is connected to the indoor control board 120.
  • the first power line 41a of the first cable 61 branches at connection terminals 311 and 312 provided on the first terminal block 310 of the ventilation device 30. That is, the first power line 41a is connected to a sixth power line 46a connected to the connection terminal 311 and a seventh power line 47a connected to the connection terminal 312. Further, the first power line 41b of the first cable 61 branches at connection terminals 313 and 314 provided on the first terminal block 310. The first power line 41b is connected to a sixth power line 46b connected to the connection terminal 313 and a seventh power line 47b connected to the connection terminal 314.
  • the sixth power lines 46a and 46b are connected to the ventilation control board 330. Specifically, the sixth power supply lines 46a and 46b are connected to the SW power supply 333 via the NF331 and the CNV332, and the necessary power is generated in the SW power supply 333, and the display unit 341, SW342, ventilation fan 343, and ST It is supplied to each part such as the motor 344 and MPU 335. In this way, power is supplied to the ventilation device 30 from the indoor unit 10 via the first power lines 41a and 41b of the first cable 61. Therefore, the ventilation device 30 does not require a dedicated power plug for the ventilation device 30.
  • the ventilation device 30 When the voltage of the commercial power supply is 100V, the ventilation device 30 generates power of about 141V, which is ⁇ 2 times the voltage of the commercial power supply, and supplies it to the ventilation fan 343. When the voltage of the commercial power supply is 200V, the ventilation device 30 generates approximately 283V of power, which is supplied to the ventilation fan 343. By supplying high voltage power to the ventilation fan 343, the amount of current consumed by the ventilation fan 343 can be suppressed. Note that this high voltage power is directly supplied from the CNV 332 to the ventilation fan 343. On the other hand, for controlling the ventilation fan 343, power of, for example, 15V is supplied to the ventilation fan 343 via the SW 333 and the FET 334.
  • the seventh power lines 47a, 47b are connected to the second power lines 42a, 42b of the second cable 62 via connection terminals 321, 322 provided on the second terminal block 320 of the ventilation device 30, respectively.
  • the second power lines 42a, 42b are connected to the fifth power lines 45a, 45b via connection terminals 211, 212 provided on the outdoor terminal block 210, respectively.
  • the fifth power lines 45a and 45b are connected to the outdoor control board 220.
  • the fifth power supply lines 45a and 45b are connected to the SW power supply 223 via the NF221 and the CNV222. Then, in the SW power supply 223, necessary power is generated and supplied to each part of the outdoor unit 20.
  • the outdoor unit 20 is supplied with power from the indoor unit 10 via the first power lines 41a, 41b of the first cable 61 and the second power lines 42a, 42b of the second cable 42.
  • the outdoor unit 20 also does not require a dedicated power plug for the outdoor unit 20, and can avoid running out of electrical outlets.
  • one indoor terminal block 110 can be used to connect the ventilation system 30 and the outdoor unit 20. It is possible to supply power to
  • the first communication line 51 of the first cable 61 is connected to the fourth communication line 54 via the connection terminal 114 of the indoor terminal block 110 of the indoor unit 10.
  • the fourth communication line 54 is connected to the communication circuit 125 of the indoor control board 120.
  • the first communication line 51 is also connected to the sixth communication line 56 via the connection terminal 315 of the first terminal block 310 of the ventilation device 30 .
  • the sixth communication line 56 is connected to the connection terminal 323 of the second terminal block 320 without passing through the ventilation control board 330.
  • the sixth communication line 56 is connected to the second communication line 52 of the second cable 62 via the connection terminal 323.
  • the second communication line 52 is connected to the fifth communication line 55 via a connection terminal 213 provided on the outdoor terminal block 210.
  • the fifth communication line 55 connects to the communication circuit 224 of the outdoor control board 220.
  • the indoor unit 10 and the outdoor unit 20 can communicate through a communication path that does not go through the ventilation control board 330.
  • the indoor unit 10 and the outdoor unit 20 transmit and receive information such as instructions received via the remote control communication unit 11 via this communication path.
  • the communication path between the indoor unit 10 and the outdoor unit 20 is formed so as to pass through the ventilation control board 330, a reduction in communication signal strength becomes a problem.
  • the communication path between the indoor unit 10 and the outdoor unit 20 does not go through the ventilation control board 330. Therefore, it is possible to prevent the communication signal strength from decreasing.
  • the indoor unit 10 and the ventilation control board 330 are connected by third communication lines 53a and 53b provided separately from the first cable 61.
  • the third communication lines 53a and 53b are connected to the dedicated communication terminal 126 of the indoor unit 10 and the dedicated communication terminal 336 of the ventilation device 30.
  • Communication between the indoor unit 10 and the ventilation device 30 is performed via third communication lines 53a and 53b.
  • information regarding control of the ventilation device 30, such as starting/stopping operation of the ventilation device 30, received via the remote control communication unit 11, is transmitted to the ventilation device 30 via the third communication lines 53a, 53b.
  • the MPU (microprocessor) 335 of the ventilation control board 330 performs control related to ventilation based on the information received via the third communication lines 53a and 53b.
  • the indoor unit 10 and the ventilation control board 330 can communicate via the third communication lines 53a and 53b, the indoor unit 10 and the ventilation device 30 can also be reliably communicated.
  • the same type of cable is connected to the indoor terminal block 110, the outdoor terminal block 210, the first terminal block 310, and the second terminal block 320. Therefore, the indoor terminal block 110 of the indoor unit 10 and the outdoor terminal block 210 of the outdoor unit 20 can be directly connected with a cable without installing the ventilation device 30.
  • commercial AC power is directly supplied from the indoor unit 10 to the outdoor unit 20, and the indoor unit 10 and the outdoor unit 20 are directly connected by a cable communication line.
  • FIG. 4 is a diagram showing a configuration related to the earth in the air conditioner 1.
  • the indoor control board 120 is housed in an indoor electrical box 140.
  • the outdoor control board 220 is housed in an outdoor electrical box 240.
  • the ventilation control board 330 is housed in a ventilation electrical box 350.
  • the indoor electrical box 140, the outdoor electrical box 240, and the ventilation electrical box 350 are all metal electrical boxes.
  • the indoor electrical box 140 is connected to a grounding means 70 that is grounded to the earth.
  • the indoor control board 120 is connected to the earth (grounded) via the ground connection line 77, the indoor electrical box 140, and the grounding means 70.
  • Ground connection lines 71 and 72 are further connected to the indoor electrical box 140.
  • a ground connection line 71 is connected to the indoor heat exchanger 12.
  • the indoor heat exchanger 12 is made of a metal member such as aluminum or copper, and is an example of a metal member.
  • the indoor heat exchanger 12 is connected to the casing of the outdoor unit 20 via a refrigerant pipe 5 provided between the indoor heat exchanger 12 and the outdoor unit 20 .
  • the refrigerant pipe 5 is made of metal such as copper, and therefore can function as a ground connection line.
  • the casing of the outdoor unit 20 is also made of metal.
  • a ground connection line 74 is connected between the outdoor electrical box 240 and the casing of the outdoor unit 20.
  • the outdoor control board 220 includes the ground connection wire 76, the outdoor electrical box 240, the ground connection wire 74, the casing of the outdoor unit 20, the refrigerant pipe 5, the indoor heat exchanger 12, the ground connection wire 71, and the indoor electrical box 140. and is connected to the earth (grounded) via the grounding means 70.
  • the indoor unit 10 is further provided with a metal plate 150 for fixing the ground connection wire 73 that connects the indoor electrical box 140 and the ventilation electrical box 350 of the ventilation system 30.
  • a ground connection line 72 connected to the indoor electrical box 140 is connected to the metal plate 150 .
  • a screw hole 151 is formed in the metal plate 150.
  • One end of the ground connection line 73 is connected to the screw hole and fixed with a screw. Note that the other end of the ground connection line 73 is connected to the ventilation electrical box 350.
  • the metal plate 150 in which the screw holes 151 are formed is provided in the indoor unit 10 in advance, the operator can easily connect the ground connection line extending from the ventilation device 30 to the indoor unit 10. .
  • a metal member having another shape may be used instead of the metal plate 150.
  • the thickness of the metal plate 150 is formed to be thicker than the thickness of the indoor electrical box 140. This can prevent the screw hole 151 from being crushed and the screw from spinning idly during the screw fastening operation. Furthermore, the metal plate 150 is provided adjacent to the lower side of the indoor terminal block 110. Thereby, workability when connecting the ground connection line 73 to the metal plate 150 can be improved.
  • the ground connection wire 73 is attached to the ventilation electrical box 350 in advance, and the operator does not need to connect the ground connection wire 73 to the ventilation electrical box 350 during installation. Therefore, there is no risk that the screw holes in the ventilation electrical box 350 will be crushed during installation, so the ground connection wire 73 can be directly attached to the screw holes in the ventilation electrical box 350 without using a metal plate.
  • a ground connection wire 73 is passed through a hole provided in the housing of the ventilation device 30 in advance, and the ground connection wire 73 extends from the ventilation device 30. Therefore, the operator can easily connect the ventilation device 30 and the indoor unit 10 with the ground connection line by simply connecting the ground connection line 73 to the metal plate 150 of the indoor unit 10 during installation.
  • the third communication lines 53a and 53b are also passed through the holes provided in the housing of the ventilation device 30 in advance.
  • the ventilation control board 330 is connected to the earth via the grounding connection line 75, the ventilation electrical box 350, the grounding connection line 73, the metal plate 150, the grounding connection line 72, the indoor electrical box 140, and the grounding means 70. Connected (grounded). In this way, the ventilation control board 330 is connected to the indoor electrical box 140 via the ground connection line 73.
  • the ventilation control board 330 is an example of an option unit control board.
  • the ventilation electrical box 350 is an example of an optional unit electrical box.
  • the ground connection line 75 may be a metal member.
  • ground connection line 73 connected to the ventilation electrical box 350 is longer than other ground connection lines (ground connection lines 71, 72, 74). Further, the length of the ground connection line between the indoor electrical box 140 and the ventilation electrical box 350 (the total length of the ground connection lines 72 and 73) is longer than the lengths of other ground connection lines. Thereby, the ground connection line 73 can be connected to the indoor electrical box 140 in a state where the indoor unit 10 and the ventilation device 30 are installed.
  • the thickness of the coating of the ground connection wire 73 is thicker than the coating thickness of the harness connecting the SW power source 333 and the secondary electric member.
  • the secondary electric component is a component that operates with a secondary power source whose voltage is stepped down by the SW power source 333, and includes, for example, a stepping motor that drives the vertical wind direction plates (not shown), and a stepping motor that drives the left and right wind direction plates (not shown). It is a stepping motor etc. that drives the motor.
  • the SW power supply 333 is an example of an isolated voltage step-down circuit. In this way, by increasing the thickness of the coating of the grounding connection line 73, electric shock due to deterioration of the coating of the grounding connection line 73 can be prevented.
  • the ventilation device 30 and the outdoor unit 20 are supplied to the ventilation device 30 and the outdoor unit 20 via the indoor unit 10, and the indoor unit 10, the outdoor unit 20, and the ventilation device 30 each The necessary power is generated at Since high voltage power is also supplied to the ventilation device 30, the ventilation device 30 is also connected to the ground (grounded). Furthermore, the indoor unit 10 and the outdoor unit 20 are connected by a refrigerant pipe 5 that functions as a ground connection line, and the ventilation device 30 is connected to the indoor unit 10 by a ground connection line 73. Thereby, the indoor control board 120, the outdoor control board 220, and the ventilation control board 330 can have a common earth ground.
  • the air conditioner 1 of the present embodiment has a simple configuration and can connect the optional unit of the air conditioner to the earth ground. Further, since the indoor unit 10 is provided with a metal plate 150 for connecting the ground connection line 73 extending from the ventilation electrical box 350, the ground connection line 73 can be easily attached.
  • the grounding means for connecting to (grounding) the earth may be provided in the outdoor unit 20 or the ventilation system 30 instead of the indoor unit 10.
  • the ground connection wires connected to the indoor electrical box 140, the outdoor electrical box 240, and the ventilation electrical box 350 are directly or indirectly connected to the grounding means provided in the outdoor unit 20 or the ventilation device 30. All you have to do is stay there.
  • one end of the ground connection line 73 is connected to the ventilation electrical box 350, and the other end is connected to the indoor electrical box 140, but the present invention is not limited to this.
  • the ground connection line 73 only needs to be connected to at least one of the refrigerant pipe 5, the indoor heat exchanger 12, the outdoor heat exchanger 22, and the outdoor electrical box 240.
  • the indoor electrical box 140, the outdoor electrical box 240, and the ventilation electrical box 350 can share a common earth ground.
  • the indoor control board 120, the outdoor control board 220, and the ventilation control board 330 were all connected to the ground connection line through a metal electrical box, but these were connected directly to the ground connection line without going through the electrical box. You can also connect it with For example, if the electrical box is not made of metal or is not provided, each board 120, 220, 330 may be directly connected to the ground connection line.
  • the grounding means 70 and the power plug 40 may be integrally formed as a grounded power plug.
  • the metal plate 150 may be provided above and adjacent to the indoor terminal block 110. Further, as another example, the metal plate 150 may be provided adjacent to the left side or the right side of the indoor terminal block 110. In this case as well, the operability of screwing can be improved. Moreover, the metal plate 150 and the indoor terminal block 110 may be formed as one unit. Thereby, when manufacturing the indoor unit 10, it is sufficient to simply attach the unit, and positional adjustment of the metal plate 150 and the indoor terminal block 110 can be made unnecessary.
  • the optional unit is not limited to a ventilation device, but may be an air cleaner, for example.
  • “Option” not only means that it can be installed at the purchaser's choice in accordance with the predetermined standard specifications, but also includes the meaning that it can be retrofitted and the meaning that it is separate from the indoor unit 10 and outdoor unit 20. I'm here.
  • the ventilation device 30 is sold as a set together with the indoor unit 10 and the outdoor unit 20 in a sales format that does not allow the user to select whether or not to install the ventilation device 30. Even in such a case, when the ventilation device 30 is separate from the indoor unit 10 and the outdoor unit 20, the ventilation device 30 is an optional unit.
  • the refrigerant pipe 5 is used as the ground connection line connecting the indoor unit 10 and the outdoor unit 20.
  • the ground connection line is not limited in its shape or thickness, and includes refrigerant piping made of metal.
  • a ground connection line may be provided separately from the refrigerant pipe 5 to connect the indoor electrical box 140 and the outdoor electrical box 240. In this case, the ground connection line may electrically connect the indoor electrical box 140 and the outdoor electrical box 240 directly or indirectly.
  • the ventilation system 30 may further be provided with a metal plate for fixing the ground connection wire 73 that connects the indoor electrical box 140 and the ventilation electrical box 350 of the ventilation system 30. Similar to the metal plate 150 of the indoor unit 10, the ground connection line 73 connected to the ventilation electrical box 350 is connected to the metal plate. A screw hole is formed in the metal plate. One end of the ground connection line 73 is connected to the screw hole and fixed with a screw. Note that the other end of the ground connection line 73 is connected to the ventilation electrical box 350. In this way, a metal plate in which screw holes are formed may be provided in advance on the ventilation device 30, and a ground connection line may be connected when the ventilation device 30 is installed. The configuration of the metal plate other than this is similar to the configuration of metal plate 150.
  • FIG. 5 is a diagram showing a configuration related to the earth in the air conditioner 2 according to the second embodiment.
  • configurations that are different from the air conditioner 1 according to the first embodiment are mainly shown, and the different configurations will be mainly explained below.
  • the ventilation device 3000 of the second embodiment includes a Y capacitor 338 for noise countermeasures.
  • the Y capacitor 338 is provided between the first terminal block 310 and the CNV 332 on the ventilation control board 3001.
  • One end of the ground connection line 75 is connected between the two capacitors of the Y capacitor 338, and the other end is connected to the ventilation electrical box 3002.
  • a noise path is formed from the Y capacitor 338 to the grounding means 70 via the grounding connection lines 75 and 73.
  • the ventilation control board 3001 is connected to the ventilation electrical box 3002 via the Y capacitor 338 and the ground connection line 75.
  • the indoor control board 120, the outdoor control board 220, and the ventilation control board 330 are all connected to the ground connection line via a metal electrical box. Although connected, these may be connected directly to the ground connection wire without going through the electrical box. For example, if the electrical box is not made of metal or is not provided, each board 120, 220, 330 may be directly connected to the ground connection line. Further, in this case, the Y capacitor 338 of the ventilation control board 330 is connected to the ground connection line 73. Thereby, whether through the electric box or not, by grounding the ventilation device 30, it is possible to take measures against noise in the ventilation control board 330.
  • Y capacitors may also be provided in the indoor control board 120 and the outdoor control board 220 depending on the required power.
  • the Y capacitor of the indoor control board 120 may be directly or indirectly connected to the grounding means 70, and the Y capacitor of the outdoor control board 220 may be indirectly connected to the refrigerant pipe 5 via the ground connection line. It is fine if it is done. Thereby, noise countermeasures can be taken for each board.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

Le but de la présente invention est de raccorder une unité facultative d'un climatiseur à la terre avec une structure simple. La solution selon la présente invention porte sur une configuration comprenant une unité intérieure, une unité extérieure et une unité facultative. Une unité facultative présente une ligne de raccordement à la terre qui est raccordée à au moins un des éléments suivants : une ligne de raccordement à la terre de l'unité intérieure ; une ligne de raccordement à la terre de l'unité extérieure ; un élément métallique, qui est disposé dans l'unité intérieure ou l'unité extérieure et est raccordé à la ligne de raccordement à la terre de l'unité intérieure ou de la ligne de raccordement à la terre de l'unité extérieure ; et une ligne de raccordement à la terre raccordant l'unité intérieure à l'unité extérieure.
PCT/JP2022/019020 2022-04-27 2022-04-27 Climatiseur WO2023209841A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2022545407A JP7246580B1 (ja) 2022-04-27 2022-04-27 空気調和機
PCT/JP2022/019020 WO2023209841A1 (fr) 2022-04-27 2022-04-27 Climatiseur
CN202280031033.5A CN117321346A (zh) 2022-04-27 2022-04-27 空调机
JP2022170530A JP2023163115A (ja) 2022-04-27 2022-10-25 空気調和機
TW112115797A TW202346766A (zh) 2022-04-27 2023-04-27 空調機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/019020 WO2023209841A1 (fr) 2022-04-27 2022-04-27 Climatiseur

Publications (1)

Publication Number Publication Date
WO2023209841A1 true WO2023209841A1 (fr) 2023-11-02

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CN117321346A (zh) 2023-12-29

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